[求助]SQL语法问题

[艾勒伯格]

表一 order 表中有id,username,productid,price,count,totalprice这几个字段
表二 cart 表中也有id,username,productid,price,count,totalprice这几个字段
请问如何写一个SQL语句把cart 中名字为zhangsan的内容插入到order表中?

[艾勒伯格]

public class ShoppingCartToOrder { public boolean moveToOrder(String username) { boolean result=false; Connection con = DBConnector.getConnection(); try { PreparedStatement ps = con.prepareStatement(""); ps.setString(1, username); if (ps.executeUpdate() > 0) { result = true; } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; }